化简求值:4x-[3x-2x-(x-3),其中x=1/2化简求值,

问题描述:

化简求值:4x-[3x-2x-(x-3),其中x=1/2
化简求值,

4x-[3x-2x-(x-3)
=4X-3X+2X+X-3
=4X-3
X=1/2
4X-3
=1/2*4-3
=-1

4x-[3x-2x-(x-3),
= 4x - [x -x +3 ]
= 4x - 3
其中x=1/2
原式 = 4/2 -3
= 2- 3
= -1


4x-[3x-2x-(x-3)]
=4x-(x-x+3)
=4x-3
=4×(1/2)-3
=2-3
=-1